ISLAMABAD – Immunity to COVID-19 in recovered patients may only last a few months, said German researchers, suggesting that coronavirus antibodies may not remain in the body for long.
The study showed that patients at a clinic in Munich showed a significant drop in the number of neutralising antibodies in the body.
"In four of our nine patients, we found a drop in neutralising antibodies in a special test that can only be carried out in a high-security laboratory," Clemens Wendtner of the hospital''s infectious diseases department was quoted as saying by brusselstimes.com.
"The impact on long-term immunity and vaccination strategies remains speculative but this needs to be monitored," he added. The findings suggested that recovered patients could become re-infected with coronavirus, although further tests have yet to confirm this.
According to the study, the body's immune response consists of B cells, which secrete antibodies, and T cells, which are capable of recognising and killing previously detected antigens. Both are necessary for long-term immunity. Wendtner's findings are consistent with other studies around the world, the report said.
Last month, another study published in the journal Nature Medicine revealed that people who develop coronavirus-fighting antibodies might not keep them very long, especially if they didn't have symptoms.
A Spanish study published this month in the journal The Lancet found that only 5 per cent of the population in Spain has developed antibodies, nowhere near the levels needed to achieve ''herd immunity''.
Associated Press of Pakistan Corporation (APPC) - Pakistan's Premier News Agency
Pakistani rupee remains stable against US dollar in the open market on 29 March, 2024.
In the open market, the US dollar was being quoted at 278.3 for buying and 281.05 for selling.
Euro moves down to 299.75 for buying and 302.75 for selling while British Pound hovers around 353.75 for buying, and 357.25 for selling.
UAE Dirham AED remains stable at 75.55 whereas the Saudi Riyal saw minor increase, with new rates at 73.70.
Currency | Symbol | Buying | Selling |
US Dollar | USD | 278.3 | 281.05 |
Euro | EUR | 299.75 | 302.75 |
UK Pound Sterling | GBP | 353.75 | 357.25 |
U.A.E Dirham | AED | 75.55 | 76.3 |
Saudi Riyal | SAR | 73.70 | 74.4 |
Australian Dollar | AUD | 182.9 | 184.7 |
Bahrain Dinar | BHD | 739.61 | 747.61 |
Canadian Dollar | CAD | 204.25 | 206.46 |
China Yuan | CNY | 38.74 | 39.14 |
Danish Krone | DKK | 40.30 | 40.7 |
Hong Kong Dollar | HKD | 35.55 | 35.9 |
Indian Rupee | INR | 3.33 | 3.44 |
Japanese Yen | JPY | 1.86 | 1.94 |
Kuwaiti Dinar | KWD | 901.14 | 910.14 |
Malaysian Ringgit | MYR | 59.25 | 59.85 |
New Zealand Dollar | NZD | 168.56 | 170.56 |
Norwegians Krone | NOK | 26.19 | 26.49 |
Omani Riyal | OMR | 724.36 | 732.36 |
Qatari Riyal | QAR | 76.57 | 77.27 |
Singapore Dollar | SGD | 206.25 | 208.25 |
Swedish Korona | SEK | 26.89 | 27.19 |
Swiss Franc | CHF | 313.78 | 316.28 |
Thai Bhat | THB | 7.76 | 7.91 |
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